Wetting-induced layer contraction in illite and mica-family relatives

Kühnel, R.A.; Gaast, S. J. van der; Broekmans, Maarten A. T. M.; Theng, B. K. G.

doi:10.1016/j.clay.2016.09.027

Cited by 6 publications

(4 citation statements)

References 20 publications

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“…According to the mineral composition analysis of marl, it contains 24.50% clay minerals, and these clay minerals include illite (44%), illite-smectite mixed-layer minerals (36%) and kaolinite (20%), as shown in Figure 2. Illite and illite-smectite mixed-layer minerals are highly hydrophilic minerals [24]. During the immersion process, it was found that the color of the distilled water mixture gradually turned pale yellow after immersion, which was speculated to be caused by the loss of the water-rock chemical reaction from illite and illite-smectite mixed-layer minerals to distilled water [32].…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, it is necessary to study the solid waste utilization method of open-pit coal mines and CPB performance under wetting-drying cycles. Most of the striped rock layers in open-pit coal mines belong to geological soft rock, often containing a large amount of expansive clay minerals, which easily soften, expand and disintegrate in water [24]. Currently, with CPB with waste as the aggregate, clay minerals and their influence on its performance need to be considered [25].…”

Section: Introductionmentioning

confidence: 99%

“…Although these studies have increased the understanding of the effect of wetting-drying cycles on gypsum-treated soil, there has been no relevant experimental study on the effect of CPB containing clay minerals, and the degree and mechanism of deterioration need further study. Most of the striped rock layers in open-pit coal mines belong to geological soft rock, often containing a large amount of expansive clay minerals, which easily soften, expand and disintegrate in water [24]. Currently, with CPB with waste as the aggregate, clay minerals and their influence on its performance need to be considered [25].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Wetting–Drying Cycles on the Deterioration of the Physical and Mechanical Properties of Cemented Paste Backfill in Open-Pit Coal Mines

Chen,

Shu,

Han

et al. 2024

Minerals

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To promote the sustainable exploitation of open-pit coal resources, waste is used as backfill material to realize the comprehensive utilization of solid waste mine resources. We proposed a mining method that is a combination of the highwall mining and filling mining methods. Cemented paste backfill (CPB) samples were prepared with high-clay-mineral-content marl particles as aggregate and normal Portland cement, sulfoaluminate cement and gypsum as cementing materials. The physical and mechanical properties and microstructural evolution of CPB with different binder ratios under wetting–drying cycles were measured. The results showed that the CPB with 0–3 wetting–drying cycles underwent shear and tensile coalescence, and that with 4–10 cycles underwent shear coalescence. The unconfined compressive strength (UCS) and elastic modulus (EM) decreased exponentially with increasing number of wetting–drying cycles but decreased exponentially and cubically with increasing porosity, respectively. The EM is more sensitive to gypsum content than the UCS. CPB deterioration was divided into an initial deterioration stage and a secondary deterioration stage. The evolution curve of the total damage variable presents an ‘S’ shape, with an initial damage stage, an accelerated damage expansion stage, a decelerated damage expansion stage and an end damage stage. The research results provide a basis for improving the recovery rate of resources under highwall conditions, and the extensive utilization of stripping materials, and promote the coordinated development of coal resource exploitation and environmental protection.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Effect of Wetting–Drying Cycles on the Deterioration of the Physical and Mechanical Properties of Cemented Paste Backfill in Open-Pit Coal Mines

Chen,

Shu,

Han

et al. 2024

Minerals

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“…Ilmenite has reversible contraction and expansion under wetting and drying conditions. The degree of contraction/expansion varies by type, and the greater the wet/dry cycle amplitude, the more significant the volume change (Kühnel et al, 2017;Zhou et al, 2022). Repeated soil expansion and contraction triggered by dry-wet cycles in the external environment strongly affect the soil's internal microstructure and pore distribution (Al-Mahbashi et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Effect of dry-wet alternation on the adsorption of dissolved organic matter by soil minerals

Hu,

Zhou,

Dai

et al. 2024

Physicochem. Probl. Miner. Process.

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Dry-wet alternation has an essential effect on soil minerals' adsorption of dissolved organic matter. In this study, kaolin, illite, and hematite were subjected to 0, 1, 3, and 6 dry-wet alternation incubation tests, respectively, and the changes in the characterization of the three minerals were explored by using a BET specific surface area analyzer and an X-ray diffractometer. The effects of different dry-wet alternation treatments on the adsorption of tannic acid and glucose as the representatives of dissolved organic matter were investigated by isothermal and kinetic adsorption tests as well as by different model-fitting methods. The effects of different dry-wet alternation treatments on the adsorption of tannic acid and glucose by the three minerals were investigated by isothermal and kinetic adsorption tests and different model fitting methods. The results showed that alternating dry-wet treatment could change the three minerals' specific surface area and average pore diameter to different degrees. Still, the spacing of the crystal layers did not change significantly. The dry-wet alternation did not alter the adsorption process and tannic acid and glucose adsorption mode. Still, it affected the equilibrium adsorption amount to different degrees, which was illite>hematite>kaolin, and the intensity of the effect was mainly affected by the decrease of the specific surface area of the minerals, which was not related to the change of the average pore diameter and the spacing of the crystal layers.

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Synthesis of carboxymethyl chitosan as an eco-friendly amphoteric shale inhibitor in water-based drilling fluid and an assessment of its inhibition mechanism

Lei

Huang

Sun

et al. 2020

Applied Clay Science

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Wetting-induced layer contraction in illite and mica-family relatives

Cited by 6 publications

References 20 publications

The Effect of Wetting–Drying Cycles on the Deterioration of the Physical and Mechanical Properties of Cemented Paste Backfill in Open-Pit Coal Mines

The Effect of Wetting–Drying Cycles on the Deterioration of the Physical and Mechanical Properties of Cemented Paste Backfill in Open-Pit Coal Mines

Effect of dry-wet alternation on the adsorption of dissolved organic matter by soil minerals

Synthesis of carboxymethyl chitosan as an eco-friendly amphoteric shale inhibitor in water-based drilling fluid and an assessment of its inhibition mechanism

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